|
LEM |
Current Transducer CT 100-S
For very accurate measurements of currents : DC, AC, pulsed...,
with a galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).
Provisional
IPN = 100 A
Electrical data
IP N
I
P
VO U T
K
N
RL
C
L
tC
V
C
IC
V
d
Primary nominal r.m.s. current
Primary current, measuring range
Analog output voltage
Conversion ratio
Load resistance
Capacitance loading
Output short-circuit duration 1)
Supply voltage (± 5 %)
Current consumption
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
100
0 .. ± 150
5
100 A / 5 V
> 500
≤5
∞
± 15
90 + VOUT / R L
6
A
A
V
Ω
nF
s
V
mA
kV
Accuracy - Dynamic performance data
X Overall accuracy @ I
G PN
- 25°C .. + 70°C
VO
t
r
di/dt
f
Offset voltage @ IP = 0
TA = 25°C
- 25°C .. + 70°C
Response time 2) @ 90 % de I
PN
di/dt accurately followed
Frequency bandwidth (- 3 dB) @ 10 % of IPN
± 0.15
%
Typ Max
± 0.4 mV
± 0.6 mV
400
60
DC .. 250
ns
A/µs
kHz
General data
T Ambient operating temperature
A
TS Ambient storage temperature
m Mass
Standards
- 25 .. + 70
°C
- 40 .. + 85
°C
670 g
EN 50178 : 1997
Notes : 1) If the short-circuit has a duration more than 1 s, the primary current of
the supply voltage must be interrupted for a short time to restore the
transducer to proper working order. The internal protection is done by
PTC resistors
2) With a di/dt of 60 A/µs.
Features
• Closed loop (compensated) current
transducer
• Insulated plastic case recognized
according to UL 94-V0
• Patent pending.
Advanced features
• f = 250 kHz
•
X
G
=
± 0.15 % (- 25°C .. + 70°C).
Advantages
• Excellent accuracy
• Very good linearity
• Low temperature drift
• Optimized response time
• Wide frequency bandwidth
• No insertion losses
• High immunity to external
interference
• Current overload capability.
Applications
• AC variable speed drives and servo
motor drives
• Static converters for DC motor drives
• Battery supplied applications
• Uninterruptible Power Supplies
(UPS)
• Switched Mode Power Supplies
(SMPS)
• Power supplies for welding
applications.
060808/5
LEM
www.lem.com
Dimensions CT 100-S (in mm. 1 mm = 0.0394 inch)
Front view
Left view
Secondary terminals
Terminal + : supply voltage + 15 V
Terminal M : measure
Terminal 0 : 0 V
Terminal - : supply voltage - 15 V
Connection
Top view
Mechanical characteristics
Remarks
• General tolerance
• Fastening
• Primary through-hole
• Connection of secondary
Fastening torque
± 0.3 mm
2 x M5 screws
∅ 15 mm
M5 threaded studs
2.2 Nm or 1.62 Lb - Ft
• VOUT is positive when IP flows in the direction of the arrow.
• This transducer induces into the primary circuit a square
wave of 3.5 mV amplitude (frequency ≈ 220 Hz). This voltage
can induce an AC current in the primary if the primary
impedance is low.
• This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
|